[Tilesathome] tiles at home = mission impossible?

[Dirk-Lüder Kreie]

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Norbert Hoffmann schrieb:
> Hi,
> 
> if I understand it right, lowzoom now works like this:
> 
> Generating levels 8-11 tries to read zoom 12 'captionless' for all needed
> tiles. The servercode "sees" that most zoom 12 'captionless' are missing
> and requests rendering for zoom 12. The client renders zoom 12
> 'captionless' (which is needed) + zoom 12-17 'tile' (which are not needed
> but use most space and time).

Well they are updated, since we have the data at the client anyway, and
you forget the maplint tiles (12-16) which are updated aswell.

> The world at zoom 0 will be finished not before all 68,719,476,735 tiles
> are rendered. 

Not correct, since the maximum zoom counting towards z0 is z8, because
every higher zoom tile will be less than a pixel on z0.

> To say it in days: All 16,777,216 zoom 12 tiles will need about 4 years if
> nobody changes anything in the db or in the rules from now on (and the
> rendering speed stays at about 500 per hour).

When we moved server to the current one we did re-render the entire
(known) OSM world in several weeks.


- --

Dirk-Lüder "Deelkar" Kreie
Bremen - 53.0952°N 8.8652°E

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